TECH & SCIENCE
California Hit by 400 Earthquakes in Swarm on San Andreas Fault, USGS Warns Bigger Quakes Could Strike

Aswarm of more than 400 earthquakes has hit California in the area between the San Andreas fault and the Imperial fault, with further seismic activity and potentially larger earthquakes set to follow over the next week.

The biggest earthquake that has been recorded in the swarm so far was a magnitude 4.9, which hit at 5.31 p.m. local time on September 30, but bigger quakes are a possibility.

"In a typical week, there is approximately a three in 10,000 chance of a magnitude 7+ earthquake in the vicinity of this swarm,' the U.S. Geological Survey (USGS) said in a statement. "During this earthquake swarm, the probability of larger earthquakes in this region is significantly greater than usual. Currently, the swarm is rapidly evolving, and we expect to update this forecast with more specific probability information as we collect more data."
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